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Finding the Fourth Proportional to 315,956.96, 436,031.20 and 172,713.92

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Solution

The fourth proportional to 315,956.96, 436,031.20 and 172,713.92 is: 238,351.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,956.96 : 436,031.20 = 172,713.92 : x
  2. Step 2: Convert to fraction form
    315,956.96/436,031.20 = 172,713.92/x
  3. Step 3: Cross multiply
    315,956.96x = 436,031.20 × 172,713.92
  4. Step 4: Simplify right side
    315,956.96x = 75,308,657,794.30
  5. Step 5: Solve for x
    x = 75,308,657,794.30/315,956.96
  6. Step 6: Final answer
    x = 238,351.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.